The world’s 100 most endangered and unique birds have been ranked in a newly published study, and the list includes a corpse-eater with legendary skills of decapitation, a shameless self-inflator, and the world's heftiest parrot.

The world’s 100 most endangered and unique birds have been ranked in a newly published study, and the list includes a corpse-eater with legendary skills of decapitation, a shameless self-inflator, and the world's heftiest parrot.

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